It took Carla 36 minutes to run four miles. Convert this ratio into a unit rate by finding how long it took Carla to run one mile.
A. 1/9 miles/minute
B 1/9 minutes/mile
C 9 miles/minute
D 9 minutes/mile
To convert the ratio into a unit rate, we need to find how long it took Carla to run one mile.
If Carla ran 4 miles in 36 minutes, we can divide the number of minutes by the number of miles to find the time it took to run one mile.
36 minutes รท 4 miles = 9 minutes/mile
Therefore, the unit rate is 9 minutes/mile.
The correct answer is D) 9 minutes/mile.